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Viewing changes to breezy/git/refs.py

  • Committer: Jelmer Vernooij
  • Date: 2020-02-07 02:14:30 UTC
  • mto: This revision was merged to the branch mainline in revision 7492.
  • Revision ID: jelmer@jelmer.uk-20200207021430-m49iq3x4x8xlib6x
Drop python2 support.

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breezy/git/refs.py
1
 
# Copyright (C) 2010 Jelmer Vernooij <jelmer@samba.org>
 
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# Copyright (C) 2010-2018 Jelmer Vernooij <jelmer@jelmer.uk>
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#
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3
# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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16
 
17
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"""Conversion between refs and Bazaar revision pointers."""
18
18
 
 
19
from __future__ import absolute_import
 
20
 
 
21
from dulwich.refs import (
 
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    ANNOTATED_TAG_SUFFIX,
 
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    LOCAL_BRANCH_PREFIX,
 
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    LOCAL_TAG_PREFIX,
 
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    )
19
26
from dulwich.repo import (
20
27
    RefsContainer,
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    )
22
29
 
23
 
from bzrlib import (
 
30
from .. import (
24
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    errors,
 
32
    osutils,
 
33
    revision as _mod_revision,
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34
    )
26
35
 
27
36
 
28
 
def extract_tags(refs):
29
 
    """Extract the tags from a refs dictionary.
30
 
 
31
 
    :param refs: Refs to extract the tags from.
32
 
    :return: Dictionary mapping tag names to SHA1s.
33
 
    """
 
37
def is_tag(x):
 
38
    return x.startswith(LOCAL_TAG_PREFIX)
 
39
 
 
40
 
 
41
def is_head(x):
 
42
    return x.startswith(LOCAL_BRANCH_PREFIX)
 
43
 
 
44
 
 
45
def is_peeled(x):
 
46
    return x.endswith(ANNOTATED_TAG_SUFFIX)
 
47
 
 
48
 
 
49
def gather_peeled(refs):
34
50
    ret = {}
35
 
    for k,v in refs.iteritems():
36
 
        if k.startswith("refs/tags/") and not k.endswith("^{}"):
37
 
            v = refs.get(k+"^{}", v)
38
 
            try:
39
 
                tagname = ref_to_tag_name(k)
40
 
            except UnicodeDecodeError:
41
 
                pass
42
 
            else:
43
 
                ret[tagname] = v
 
51
    for k, v in refs.items():
 
52
        if is_peeled(k):
 
53
            continue
 
54
        try:
 
55
            peeled = refs[k + ANNOTATED_TAG_SUFFIX]
 
56
            unpeeled = v
 
57
        except KeyError:
 
58
            peeled = v
 
59
            unpeeled = None
 
60
        ret[k] = (peeled, unpeeled)
44
61
    return ret
45
62
 
46
63
 
47
 
def branch_name_to_ref(name, default=None):
 
64
def branch_name_to_ref(name):
48
65
    """Map a branch name to a ref.
49
66
 
50
67
    :param name: Branch name
51
68
    :return: ref string
52
69
    """
53
 
    if name is None:
54
 
        return default
55
 
    if name == "HEAD":
56
 
        return name
 
70
    if name == "":
 
71
        return b"HEAD"
57
72
    if not name.startswith("refs/"):
58
 
        return "refs/heads/%s" % name
 
73
        return LOCAL_BRANCH_PREFIX + osutils.safe_utf8(name)
59
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    else:
60
 
        return name
 
75
        return osutils.safe_utf8(name)
61
76
 
62
77
 
63
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def tag_name_to_ref(name):
66
81
    :param name: Tag name
67
82
    :return: ref string
68
83
    """
69
 
    return "refs/tags/%s" % name
 
84
    return LOCAL_TAG_PREFIX + osutils.safe_utf8(name)
70
85
 
71
86
 
72
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def ref_to_branch_name(ref):
75
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    :param ref: Ref
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    :return: A branch name
77
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    """
78
 
    if ref in (None, "HEAD"):
 
93
    if ref == b"HEAD":
 
94
        return u""
 
95
    if ref is None:
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        return ref
80
 
    if ref.startswith("refs/heads/"):
81
 
        return ref[len("refs/heads/"):]
 
97
    if ref.startswith(LOCAL_BRANCH_PREFIX):
 
98
        return ref[len(LOCAL_BRANCH_PREFIX):].decode('utf-8')
82
99
    raise ValueError("unable to map ref %s back to branch name" % ref)
83
100
 
84
101
 
85
102
def ref_to_tag_name(ref):
86
 
    if ref.startswith("refs/tags/"):
87
 
        return ref[len('refs/tags/'):].decode("utf-8")
88
 
    raise ValueError("unable to map ref %s back to branch name" % ref)
 
103
    if ref.startswith(LOCAL_TAG_PREFIX):
 
104
        return ref[len(LOCAL_TAG_PREFIX):].decode("utf-8")
 
105
    raise ValueError("unable to map ref %s back to tag name" % ref)
89
106
 
90
107
 
91
108
class BazaarRefsContainer(RefsContainer):
94
111
        self.dir = dir
95
112
        self.object_store = object_store
96
113
 
 
114
    def get_packed_refs(self):
 
115
        return {}
 
116
 
97
117
    def set_symbolic_ref(self, name, other):
98
 
        if name == "HEAD":
99
 
            pass # FIXME: Switch default branch
 
118
        if name == b"HEAD":
 
119
            pass  # FIXME: Switch default branch
100
120
        else:
101
121
            raise NotImplementedError(
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                "Symbolic references not supported for anything other than "
129
149
            revid = self._get_revid_by_tag_name(tag_name)
130
150
        else:
131
151
            revid = self._get_revid_by_branch_name(branch_name)
132
 
        return self.object_store._lookup_revision_sha1(revid)
 
152
        if revid == _mod_revision.NULL_REVISION:
 
153
            return None
 
154
        # FIXME: Unpeel if necessary
 
155
        with self.object_store.lock_read():
 
156
            return self.object_store._lookup_revision_sha1(revid)
 
157
 
 
158
    def get_peeled(self, ref):
 
159
        return self.read_loose_ref(ref)
133
160
 
134
161
    def allkeys(self):
135
162
        keys = set()
136
163
        for branch in self.dir.list_branches():
137
164
            repo = branch.repository
138
165
            if repo.has_revision(branch.last_revision()):
139
 
                ref = branch_name_to_ref(branch.name, "refs/heads/master")
 
166
                ref = branch_name_to_ref(getattr(branch, "name", ""))
140
167
                keys.add(ref)
141
 
                if branch.name is None:
142
 
                    keys.add("HEAD")
143
 
            for tag_name, revid in branch.tags.get_tag_dict().iteritems():
144
 
                if repo.has_revision(revid):
145
 
                    keys.add(tag_name_to_ref(tag_name))
 
168
            try:
 
169
                for tag_name, revid in branch.tags.get_tag_dict().items():
 
170
                    if repo.has_revision(revid):
 
171
                        keys.add(tag_name_to_ref(tag_name))
 
172
            except errors.TagsNotSupported:
 
173
                pass
146
174
        return keys
147
175
 
148
176
    def __delitem__(self, ref):
149
177
        try:
150
178
            branch_name = ref_to_branch_name(ref)
151
179
        except ValueError:
152
 
            return # FIXME: Cope with tags!
 
180
            return  # FIXME: Cope with tags!
153
181
        self.dir.destroy_branch(branch_name)
154
182
 
155
183
    def __setitem__(self, ref, sha):
164
192
            target_branch = self.repo.create_branch(branch_name)
165
193
 
166
194
        rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
167
 
        target_branch.lock_write()
168
 
        try:
 
195
        with target_branch.lock_write():
169
196
            target_branch.generate_revision_history(rev_id)
170
 
        finally:
171
 
            target_branch.unlock()
 
197
 
 
198
 
 
199
def get_refs_container(controldir, object_store):
 
200
    fn = getattr(controldir, "get_refs_container", None)
 
201
    if fn is not None:
 
202
        return fn()
 
203
    return BazaarRefsContainer(controldir, object_store)
 
204
 
 
205
 
 
206
def remote_refs_dict_to_tag_refs(refs_dict):
 
207
    base = {}
 
208
    peeled = {}
 
209
    for k, v in refs_dict.items():
 
210
        if is_peeled(k):
 
211
            peeled[k[:-3]] = v
 
212
        else:
 
213
            base[k] = v
 
214
            peeled[k] = v
 
215
    all_keys = set().union(base.keys(), peeled.keys())
 
216
    for n in all_keys:
 
217
        try:
 
218
            tag_name = ref_to_tag_name(n)
 
219
        except ValueError:
 
220
            continue
 
221
        yield (n, tag_name, peeled.get(n), base.get(n))